Answer this question truthfully
### Question: Who is at highest risk for Beh%C3%A7et%27s disease ?
### Response: The underlying cause of Behçet’s disease is not clear. It is suggested that the following factors may be associated with the disease.
Genetic predisposition: Researches demonstrate that the presence of the gene HLA–B51 is a risk factor for Behçet's disease. Age: Behçet's disease can affect people in any age, but the most common age is 20~30 years old. Gender: Behçet's disease most commonly affects men than women. Behçet's disease is more common in Middle East and Japan then in other race. It is rare in America.